Толковый словарь английского языка Oxford English Reference - louvre

n. (also louver) 1 each of a set of overlapping slats designed to admit air and some light and exclude rain. 2 a domed structure on a roof with side openings for ventilation etc. Phrases and idioms louvre-boards the slats or boards making up a louvre. Derivatives louvred adj. Etymology: ME f. OF lover, lovier skylight, prob. f. Gmc